2.3 Data analysis
Kaleidoscope Pro can be used to analyze recordings of bat calls for the purpose of automatic species identification. Verified recordings of bat calls are used as the foundation for Classifier Libraries in Kaleidoscope Pro. Classifier Libraries contain multiple individual Species Classifiers. Species identification works by comparing recordings of bat calls to a known Species Classifier. To ensure greater accuracy, adjust the Classifier Threshold Menu to +1 (Conservative) and select the Classifier Library ”Bats of Europe 5.4.0”. Use the default parameters for the remaining settings. We will be using Maximum-Likelihood Estimate (MLE), a statistical method that estimates the parameters of a model. In our case, MLE will help us determine the presence or probable absence of species at a specific location and time by using a classification matrix. Local bat presence was determined by MLE and P-values (Britzke et al., 2002).